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Does prolonged stratification of Douglas fir influence the yield of seedlings?

Author

Listed:
  • K. Houšková

    (Department of Silviculture, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic)

  • A. Martiník

    (Department of Silviculture, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic)

Abstract

The paper analyses the influence of an extended period of cold stratification on the germination capacity, emergence rate and yield of seedlings in the Douglas fir as well as on the morphological parameters of one-year-old seedlings. A total of ten seed lots were used for evaluating germination capacity, originating from the Czech Republic, Slovakia, France and the USA. Germination capacity, emergence rate and yield of seedlings were analysed for two seed lots of Czech provenance on seed beds in the settings of a forest tree nursery. Tested variants involved (a) no pre-sowing treatment, (b) seed stratified for 21 days, and (c) seed stratified for 49 days. The germination capacity of the stratified seed was higher than that of the control variant for all of the seed lots. The effect of the stratification period length was zero for both germination capacity and emergence rate. Differences were identified between the stratification variants as regards germination energy and emergence rate. For the control variant, seedling yield reached only 1% and 2%. For the stratified seed, yield of seedlings of two selected Czech provenances was 18% and 16% (variant 21) and 26% and 36% (variant 49). Differences in the morphological parameters of seedlings were not straightforward.

Suggested Citation

  • K. Houšková & A. Martiník, 2015. "Does prolonged stratification of Douglas fir influence the yield of seedlings?," Journal of Forest Science, Czech Academy of Agricultural Sciences, vol. 61(6), pages 268-273.
    • Handle: RePEc:caa:jnljfs:v:61:y:2015:i:6:id:7-2015-jfs
    DOI: 10.17221/7/2015-JFS
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